He's already in the U.S. on an exchange visitor visa until June.

朱利安：他已经持交换访问者签证在美国，直到 6 月。

Julian has an uncle in Korea, who's on an exchange visitor visa.

朱利安在韩国有一个叔叔，他持有交换访问者签证。

" What about your uncle in Korea? " Julian says, " He's already in the U.S. on an exchange visitor visa until June."

“你在韩国的叔叔呢？” 朱利安说，“他已经在美国持交流访问签证， 直到六月。

An " exchange visitor visa" is permission to enter the United States in some sort of exchange program, where some people from your country come here, some people from our country go to your country.

” “交流访问者签证” 是允许通过某种交流项目进入美国， 一些人从你的国家来这里，一些人从我们国家去你的国家。